20827513 has 16 divisors (see below), whose sum is σ = 24382080. Its totient is φ = 17424000.

The previous prime is 20827511. The next prime is 20827517. The reversal of 20827513 is 31572802.

It is a cyclic number.

It is not a de Polignac number, because 20827513 - 2¹ = 20827511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20827511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62758 + ... + 63088.

It is an arithmetic number, because the mean of its divisors is an integer number (1523880).

Almost surely, 2^20827513 is an apocalyptic number.

It is an amenable number.

20827513 is a deficient number, since it is larger than the sum of its proper divisors (3554567).

20827513 is a wasteful number, since it uses less digits than its factorization.

20827513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 20827513 is about 4563.7170157669. The cubic root of 20827513 is about 275.1349772649.

The spelling of 20827513 in words is "twenty million, eight hundred twenty-seven thousand, five hundred thirteen".